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Question
Which of the following terms denotes the movement of the root of a plant towards moisture in the soil?
(a) thigmotropism
(b) chemotropism
(c) hydrotropism
(d) geotropism
Solution
(c) Hydrotropism
Hydro means water and tropism means movement. Thus, the movement of plant roots towards the moisture in the soil is called hydrotropism.
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